以双水杨醛缩二亚丙基三胺钴(Ⅱ)配合物为载体的高氯酸根离子选择性电极的研究

报道了基于钴希夫碱双水杨醛缩二亚丙基三胺合钴(II)(Co(II)-BSADDPA)为载体的溶剂聚合膜阴离子选择性电极,该电极对高氯酸根离子的电位响应具有优良的选择性和灵敏度.在pH值为5 5的缓冲溶液中,电极电位呈现近能斯特响应,线性响应范围为8×10-6～1×10-1mol/L,斜率为59 4mV/dec,检测下限为5×10-6mol/L.采用交流阻抗和光谱分析技术研究了电极的响应机理并将电极用于花炮中高氯酸根离子的检测,结果满意.     

新型双核锰金属配合物中性载体水杨酸根离子电极的研究

首次研究了基于N,N双水杨醛缩乙二胺双核锰(Ⅳ)[Mn2(Salen)2O2]为中性载体的PVC膜电极.该电极对水杨酸根(Sal-)具有优良的电位响应性能和选择性,并呈现出反Hofmeister选择性行为,其选择性次序从大到小为Sal-,ClO-4,SCN-,I-,NO-3,Br-,SO2-3,NO-2,SO2-4,Cl-.在pH=5.0的磷酸盐缓冲体系中,电极电位呈现近能斯特响应,线性响应范围为9.0×10-6～1.0×10-1mol/L,斜率为-53.6mV/dec(20℃),检测下限为7.0×10-6mol/L.采用交流阻抗技术和紫外可见光谱技术研究了电极响应机理.该电极可用于阿司匹林药品分析.     

PVC膜SCN^—电极的研制与性能

本文以十二烷基三辛基碘化铵为定域体,用一种简便的方法研制成PVC膜SCN~-电极。该电极对SCN~-的浓度在2×10~(-6)～10~(-1)mol/L范围内符合能斯特响应,电极响应斜率为56.0mV/P~(SCN-)(10℃),稳定性、选择性较佳。     

亚硒酸根离子选择电极的研制及应用

本文以4,6-二溴代苤硒脑为活性物质,邻苯二甲酸二丁酯为增塑剂,PVC为支持体研制了亚硒酸根离子选择性电极.电极对硒(Ⅳ)的响应范围为3.2×10~(-6)～1.0×10~(-1)mol硒(Ⅳ)/L,斜率为-23.6mV(21℃),检测限为1.0×10~(-6)mol硒(Ⅳ)/L.     

青霉素药物鉴测卡的制备及应用研究

文章报道了一种青霉素药物鉴测卡的实验室制备方法,研究了所制备的鉴测卡的响应特性,该活性电极响应快速,选择性、稳定性、重现性均较好。电极检测下限可达2.37×10-4mol/L,线性范围为4.68×10-4～1.0×10-1mol/L,斜率为59.3mV/pC。     

PVC膜氯离子选择性电极的制备和尿液中氯离子的测定

以氯离子-三异辛基十六烷基季铵离子缔合物为活性物质,制备了聚氯乙稀(PVC)膜氯离子选择性电极.电极在1.0×10-3～1.0 mol/L范围内呈线性响应关系,检测限为5×10-4 mol/L,响应时间约5 s,漂移小于1 mV/h,平均斜率为47mV/pC.电极的重现性、稳定性良好.采用该电极测定了人造尿液和稀释尿液中氯离子的浓度.用标准加入法,在人造尿液中氯离子的回收率在96.0%～102.5%之间;在稀释尿液中氯离子的回收率在90.3%～98.5%之间.该方法的标准偏差(SD)＜3%,P＜0.05.     

2''-(2 -呋喃亚甲基)水杨酰腙Schiff碱铜(Ⅱ)配合物为中性载体的高选择性硫氰酸根离子选择电极的研究

首次研究了以2'-(2-呋喃亚甲基)水杨酰腙Schiff碱铜(Ⅱ)配合物[Cu(Ⅱ)-THBH]为中性载体的PVC膜电极,该电极对硫氰酸根离子(SCN-)具有优良的电位响应特性并呈现出反Hofmeister选择性行为,其选择性次序从大到小为SCN-,Sal-,ClO-4,I-,Br-,NO-3,Cl-,NO-2,SO2-3,SO2-4,H2PO4-.电极在pH5.0的磷酸盐缓冲体系中,对SCN-在1.0×10-1～5.0×10-6mol/L浓度范围内呈近能斯特响应,斜率为-53.4 mV/dec(25℃),检测下限为1.2×10-6mol/L.利用交流阻抗和紫外可见光谱初步研究了阴离子与载体的作用机理,结果表明配合物中心金属原子的结构以及载体本身的结构与电极的响应行为之间有非常密切的构效关系.该电极具有响应快、重现性好、检测限低、制备简单等优点.将电极初步应用于实际样品废水分析,结果与HPLC法一致.     

以水杨醛缩邻氨基苯甲酸合铜为中性载体的硫氰酸根PVC膜电极

以水杨醛缩邻氨基苯甲酸合铜(II)[CuI(I)-HBAB]为中性载体,制备了一种对硫氰酸根(SCN-)具有优良的电位响应特性并呈现出反Hofmeister选择性行为的离子电极,其选择性次序为:SCN->ClO4->Sal->I->SO 32->NO3->Br->Cl->SO42-。该电极在pH=5.0的磷酸盐缓冲体系中具有最佳的电位响应,在1.0×10-6～1.0×10-1m ol/LSCN-浓度范围呈近能斯特响应,斜率为-57.5mV/dec(25℃),检测下限为5.0×10-7mol/L。采用交流阻抗和紫外光谱分析技术研究了配合物中心金属原子以及配合物本身的结构对电极电位响应行为的作用机理。将该电极用于废水分析,结果令人满意。     

抗坏血酸在半胱氨酸自组装膜上的电化学行为及应用

半胱氨酸自组装修饰金修饰电极对抗坏血酸(Vc)具有很高的电催化氧化活性.在pH 2.0的0.1 mol/L缓冲溶液中,可得到一对准可逆的氧化还原峰.电极反应受扩散控制.氧化峰电流与抗坏血酸浓度在5.0×10-6～1.1×10-3 mol/L范围内成线性关系,检测限为1.0×10-6 mol/L.该分析方法应用于果汁中的抗坏血酸分析,结果令人满意.     

吸附伏安法同时测定中草药中痕量的镍和钴

提出一种有效的测定痕量镍和钻的吸附伏安法。利用悬汞电极作为工作电极,在0.005mol/L NH_3～0.06 mol/L NH_4Cl—3.0×10~(-6)mol/L锌试剂的最佳底液中,测定镍和钴的线性范围分别为1×10~(-10)～8×10~(-8)mol/L和1×10~(-10)～1×10~(-7)mol/L,检测下限均为5×10~(-11)mol/L。在工作中探讨了镍、钻和锌试剂配合物的吸附伏安行为及其在电极表面上的电化学反应机理。研究证明,该方法灵敏、可靠、省时,特别适用于中草药中痕量镍和钴的定量分析。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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